# break
for i in range(5):
    if i == 3:
        break
    print(i)
    i += i

print("----------")

# continue
for i in range(5):
    if i == 3:
        continue
    print(i)
    i += i

print("----------")

# pass
for letter in 'Runoob':
    if letter == 'o':
        pass
        print('执行 pass 语句')
    # print('当前字母：%c' %letter)
    print('当前字母：', letter)
print('Good Bye')

print("----------")

# else
count = 0
while count < 5:
    print(count, "is less than 5.")
    count += 1
else:
    print(count, "is not less than 5")